I forgot my cash back at the co op once , was there someone manning the self scan tills ?, as when you leave your money in, it makes an alarm , luckily the person manning it, had heard it , and when I rang the store, they said they had it . I would ask to see the CCTV, end of the day, its theft . I was told by the person manning self scan, that if I had not come back to store to claim it, after so many weeks, the money is theirs .